Power mechanism.



J. F. BARD.

POWER MECHANISM.

APPLICATION FILED NOV. 2, 19.06.

976,115. Patented Nov.15,1910.

I q wweo oeo a 5 Svwentoz Q y I 535 a G Mme nzzfl. ZLM 1? u m nus Emma 1mm), 01* ERIE, PENNSYLVANIA, AssIGNon, BY MESNE ASSIGl.

MENTS, mo BURKE nnncrmc COMPANY, A CORPORATION or PENNSYLVANIA.

POWER MECHANISM.

To all whom it may concern.

Be it known that I, JAMES FRAziER BARB, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Power Mechanism, of which the following is a full, clear, and exact specification.

My invention relates to thetransmission of power from one wheel or shaft to another by means of a beltflink, or rope drive, or a gearing of similar character, and is particuarly applicable where an increased frictionalcontact is. desired between the belt and the drivingor driven gear.

The excessive slipping of a belt. occurs, particularl in cases where there is considerable difilerence in the diameters of the driving and driven gear wheels or ulleys, where the speed is comparatively hig as in cases Where an electric motor is used, or

v where the distance between the driving and driven shafts is small. of increasing the frictional contact is to utilize one or more idler pulleyssoas'to increase the amount of peripheral contact and consequently "the driving ower. In practicing my mvention, I- emp y idlers for this i 'urpose, and'the essential ob ects are to proshaft 1 having a wheelor pulley 2 engaged "ce...a cmistruction which will be .unlversally applicable to any desired conditions Q as. regards the direction of movement of the belt, the relative location of the drivingand driven'wheels, and an automatic compensation for an slack or changes in length or direction of the belt. These and j'ects are secured bymy invention.

One application thereof will be understood from the following description and accompanying drawings, in which;

7 Flgure 1-is aside viewshowing the general arrangement of .the apparatus; Fig. 2 is an enlarged slde view of my improved device; Flg. 3. is an end view and a part section on line 33 "of Fig. 2; and F g. 4 is a part sectional and'part elevation online 4-4 of Fig.. 2:

Referring to Fig. 1; there is indicated a I Specification of, I.ettcrs.I'atent. Application filed November 2, 1905. Serial No.

A common ineans other ob- Patented Nov. s, 1910.

portion 9 which encircles the support 7 and so permits movement of the arms as desired. The other end of each arm carries a spindle 10 upon which the'idler 11 is freely movable. The arms or the two spindles are connected together so that they are kept within a certain relation to each other. The connection is preferably yieldable and is shown as a spring 12 connecting the outer ends of the arms 8, 8 and there is also shown in this instance a second and similar spring 13 connectin the ends of the spindles 10. It will be un erstood that the length of the springs 12, 13 or the supports for their ends ma made adjustable in any of the well knowrf ways. i

In the use of my invention, it will be seen that a large peripheral contact of the belt and pulley 4 1s obtained-with a consequent increasein the driving power. It is also apparent that in installing the apparatus, the position of the arms and idlers will automatically adjust themselves to any position desired about the shaft, thus doing away with all devices for clam ing' to the frames or other means for hol arms will automatically compensate for and, take up slack in the belt or for variations in the length or direction of travel ofthe belt.

While I have shown arid fdescribed one embodiment of my Invention," it is evidentmg the idlers in place. Also the yleldable'conhec'tion of the. v

that I- am limited in the scope thereof only 1 as indicated by the following claim. It isalso understood that my -1I1V6I1tl0l1 maybe applied to either the driving or driven part,-

or. to if desired.

Having thus described my invention, I of said belt located between said idlers for declare that what I claim as new and desire drawing the idlers toward each other. 14 to secure by Letters Patent, is,- In testimony whereof I afiix my signature,

The combination of a driving element, a in presence of two witnesses. 5 driven element, a belt connecting said elev JAMES FRAZIER BARD.

1nents,.two i'dlers, means for pivotallysup- Witnesses: porting said idlers about the axis of one of G. IRVING BLAKE,

said elements, and a spring on each side EDYTHE L. ZEEB. 

